Borrowings and Other Financing Instruments (Tables)

12 Months Ended

Dec. 31, 2013

Borrowings and Other Financing Instruments [Abstract]

At Dec. 31, 2013, SPS had the following committed credit facility available (in millions):



Credit Facility ^(a)		Drawn ^(b)		Available
$	300.0	$	109.5	$	190.5


^(a)	Credit facility expires in July 2017.


^(b)	Includes outstanding commercial paper and letters of credit.

Money Pool

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Money Pool — Xcel Energy Inc. and its utility subsidiaries have established a money pool arrangement that allows for short-term investments in and borrowings between the utility subsidiaries. Xcel Energy Inc. may make investments in the utility subsidiaries at market-based interest rates; however, the money pool arrangement does not allow the utility subsidiaries to make investments in Xcel Energy Inc. Money pool borrowings for SPS were as follows:



(Amounts in Millions, Except Interest Rates)	Three Months Ended Dec. 31, 2013
Borrowing limit	$	100
Amount outstanding at period end	38
Average amount outstanding	65
Maximum amount outstanding	100
Weighted average interest rate, computed on a daily basis	0.18		%
Weighted average interest rate at period end	0.25



(Amounts in Millions, Except Interest Rates)	Twelve Months Ended Dec. 31, 2013			Twelve Months Ended Dec. 31, 2012			Twelve Months Ended Dec. 31, 2011
Borrowing limit	$	100		$	100		$	100
Amount outstanding at period end	38			—			5
Average amount outstanding	46			10			12
Maximum amount outstanding	100			63			71
Weighted average interest rate, computed on a daily basis	0.15		%	0.33		%	0.35		%
Weighted average interest rate at end of period	0.25			N/A			0.35

Commercial Paper

Borrowings and Other Financing Instruments [Abstract]

Short-Term Borrowings

Commercial Paper — SPS meets its short-term liquidity requirements primarily through the issuance of commercial paper and borrowings under its credit facility. Commercial paper outstanding for SPS was as follows:



(Amounts in Millions, Except Interest Rates)	Three Months Ended Dec. 31, 2013
Borrowing limit	$	300
Amount outstanding at period end	84
Average amount outstanding	60
Maximum amount outstanding	121
Weighted average interest rate, computed on a daily basis	0.30		%
Weighted average interest rate at period end	0.27



(Amounts in Millions, Except Interest Rates)	Twelve Months Ended Dec. 31, 2013			Twelve Months Ended Dec. 31, 2012			Twelve Months Ended Dec. 31, 2011
Borrowing limit	$	300		$	300		$	300
Amount outstanding at period end	84			9			—
Average amount outstanding	32			18			54
Maximum amount outstanding	140			106			161
Weighted average interest rate, computed on a daily basis	0.30		%	0.39		%	0.37		%
Weighted average interest rate at end of period	0.27			0.36			N/A